Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tireshowing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a fragmentary enlarged front view surrounded by line 6-6 and6-6 in FIG. 2;

FIG. 7 is a section view taken along line 7-7 in FIG. 6; and,

FIG. 8 is a section view taken along line 8-8 in FIG. 6.

The dark gray stippled shading represents tread grooves having thedepths shown in FIGS. 7 and 8.

The broken lines show portions of the tire that are not being claimed,and thus form no part of the claimed design.

CLAIM The ornamental design for a tread portion of an automobile tire,as shown and described.